A series of two-point crosses were carried out among seven loci (a, b, c, d, e,
ID: 12654 • Letter: A
Question
A series of two-point crosses were carried out among seven loci (a, b, c, d, e, f and g), producing the following recombination frequencies (%).
Loci Recombination frequency Loci Recombination frequency
a and b 50 c and d 50
a and c 50 c and e 26
a and d 12 c and f 50
a and e 50 c and g 50
a and f 50 d and e 50
a and g 4 d and f 50
b and c 10 d and g 8
b and d 50 e and f 50
b and e 18 e and g 50
b and f 50 f and g 50
b and g 50
Show the order and distance (in map units) between the loci in different linkage groups.
Explanation / Answer
50%-------------recombination
----- a-------------g---------------d----
4 8
----- c-------------b---------------e----
10 18
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